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| References | Year | Objectives | Future scope |
|
| [16] | 2016 | IoT middleware, cloud platforms, and cloud infrastructures are all surveyed as integration components. Additionally, certain integration ideas and data analytics methods are reviewed, along with various difficulties and unresolved research problems. | Users can choose the essential components depending on their own needs in order to achieve a smooth integration based on the comparisons performed and the aspects examined. |
| [29] | 2017 | A test bed is described to compare central and local data processing and highlight benefits of distributing data across multiple locations in a network. | Using test bed, this system offers network saving, real-time processing, intelligent local data processing, and potential local processing mechanisms within the smart grid. |
| [30] | 2018 | It discusses several application areas, groups the literature that is now available into these categories, introduces two usage patterns—device manipulation and data management, and provides information on the stage of development of some of the solutions currently available. | The machine economy was created as a result of attempts to commercialise data due to the prevalence of IoT devices and rising data creation. The use of BC to address the issue of data trading and interchange is an example of how this could be applied in the real world. |
| [34] | 2019 | Implementation of five privacy-preserving techniques, including privacy protection, encoding, private enterprises, combining, and discrepancy secrecy, in blockchain-based IoT systems. | Before being put into use, blockchain-based IoT devices need to be protected against a number of privacy issues. |
| [36] | 2020 | A case study is implemented in a smart IoT system utilizing the Ethereum-based Blockchain technology. | The IoT smart environment is created using sensor devices, and on the Ethereum platform, devices are authorised using the Dec AUTH protocol. |
| [40] | 2021 | The suggested BaaU-based framework for trustworthiness in the HIoT systems of the future. | Next-generation healthcare IoT (HIoT) applications may be one of the industries that the blockchain network will likely revolutionize as a technical improvement. |
| [41] | 2022 | A cooperative data sharing system where numerous data sources and consumers work together to complete data sharing tasks using cloud-edge computing and blockchain technology. | The outcomes demonstrated that it can be helpful in examining the effectiveness of any blockchain-enabled data sharing system. This will facilitate the successful implementation of efficient data exchange systems. |
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